Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
CA869829A
Inventor
R. Martin George
R. Botting John
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
MARTIN AND BOTTING DEVELOPMENTS Ltd
Original Assignee
MARTIN AND BOTTING DEVELOPMENTS Ltd
Publication date
Application grantedgrantedCritical
Publication of CA869829ApublicationCriticalpatent/CA869829A/en